Finding the Fourth Proportional to 157,899.84, 217,899.18 and 86,278.32
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Solution
The fourth proportional to 157,899.84, 217,899.18 and 86,278.32 is: 119,062.66
Step by Step Solution
- Step 1: Write the proportion equation
157,899.84 : 217,899.18 = 86,278.32 : x - Step 2: Convert to fraction form
157,899.84/217,899.18 = 86,278.32/x - Step 3: Cross multiply
157,899.84x = 217,899.18 × 86,278.32 - Step 4: Simplify right side
157,899.84x = 18,799,975,179.78 - Step 5: Solve for x
x = 18,799,975,179.78/157,899.84 - Step 6: Final answer
x = 119,062.66
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.